There are some issues with the documentation, specially in regards as to how one should handle the lifecycle appropriately. Although, granted there are several scenarios so there's no 'best practice' but rather 'best practice depending on what you are doing.' So it's probably not easy to make such a document, and it's true that right now only experience really teaches you which practice to use when.
However, you DO NOT need to call system.exit() even when you opt to have an 'exit' button. You simply finish your activity, stop any services/threads. Your app will be shut down eventually and you won't be hogging any resources beside RAM which doesn't affect battery life AFAIK. You can have an exit button, and not need to call exit. Only task managers might pick up the process, but A) those are power users B) task managers are flaky/unreliable with all apps on Android. Including stock ones. As such developers shouldn't make attempts to make their apps compatible with task managers. On Thu, Apr 28, 2011 at 4:54 PM, Indicator Veritatis <mej1...@yahoo.com>wrote: > You are directing this to the wrong person. I do not call > System.exit() in any of my shipping code, not in Android, not in Sun > Java. But I have to agree with lbendlin's comments about the "paranoid > user". Yet at the same time, once corrected for the logical mistakes > in expression whose criticism Dianne rashly takes as personal, I have > to agree with almost all of what Dianne said. The overwhelming > majority of applications should never call System.exit(), especially > since, as Dianne already pointed out, it does not even guarantee > accomplishing what the OP asked of it. The right way is to use > finish() and/or overload the lifecycle callbacks, e.g. onStop(), > onDestroy() etc. > > Finally, Google will see more people following these "best practices" > and less fruitless arguments about what they are only when the > hopelessly vague, outdated, or outright erroneous expression of those > "best practices" in the online documentation are corrected. Several > people have pointed this out several times by now (it isn't just me > anymore), yet NOTHING has been done about it. For someone who knows > what he is doing, it would take all of about 15 minutes of editing, > but it seems Google would rather thousands around the world waste > their time learning the hard way instead. > > On Apr 28, 3:04 pm, Miguel Morales <therevolti...@gmail.com> wrote: > > Calling System.exit() or even asking for it tells me that your code flow > is > > seriously flawed. > > The lifecycle of a mobile app is complex, and as such you should follow > best > > practices. > > > > On Thu, Apr 28, 2011 at 2:43 PM, Indicator Veritatis <mej1...@yahoo.com > >wrote: > > > > > > > > > I have worked for companies where even highly experienced and > > > otherwise valuable employees were fired for making posts like the one > > > you made here. > > > > > On Apr 26, 6:37 am, Dianne Hackborn <hack...@android.com> wrote: > > > > You are ignore all of the other replies I didn't make to other > threads > > > > because of you. > > > > > > On Tue, Apr 26, 2011 at 9:33 AM, Indicator Veritatis < > mej1...@yahoo.com > > > >wrote: > > > > > > > Actually, I think the post has had the desired effect, since Dianne > > > > > has updated her answer with one that more directly addresses the > OP's > > > > > question, explaining that calling System.exit() can actually be > > > > > harmful, rather than just being always unnecessary. > > > > > > > Oh, and those fancy terms ARE English. Their technical meanings in > > > > > logic are explained at the web sites I used as references for the > > > > > product description for SylloGizmo on slidme.org ( > http://slideme.org/ > > > > > application/syllogizmo) as well as at the Stanford Encyclopedia of > > > > > Philosophy's entry for the Square of Opposition, > > > > >http://plato.stanford.edu/entries/square/ > > > > > > > Contraries go straight up and down in the Square, contradictories > go > > > > > along the diagonals. > > > > > > > On Apr 25, 5:46 pm, TreKing <treking...@gmail.com> wrote: > > > > > > On Mon, Apr 25, 2011 at 7:39 PM, Indicator Veritatis < > > > mej1...@yahoo.com > > > > > >wrote: > > > > > > > > > In fact, one could believe you had answered it only if you > confused > > > the > > > > > > > contrary and the contradictory of a non-null affirmative > > > categorical > > > > > > > statement. > > > > > > > > > In fact, the mismatch between his question and your 'answer' is > > > giving > > > > > me > > > > > > > good ideas for how to update SylloGizmo to support using the > Square > > > of > > > > > > > Opposition in entering and analyzing categorical syllogisms;) > > > > > > > > I'm a little slow, so I may be the only that didn't understand a > word > > > of > > > > > > that. Your proficiency with a dictionary and thesaurus is > impressive, > > > but > > > > > if > > > > > > you have a point to make, you might want to make it in English so > the > > > > > rest > > > > > > of us can follow along =P > > > > > > ------------------------------------------------------------------------------------------------- > > > > > > TreKing <http://sites.google.com/site/rezmobileapps/treking> - > > > Chicago > > > > > > transit tracking app for Android-powered devices > > > > > > > -- > > > > > You received this message because you are subscribed to the Google > > > > > Groups "Android Developers" group. > > > > > To post to this group, send email to > > > android-developers@googlegroups.com > > > > > To unsubscribe from this group, send email to > > > > > android-developers+unsubscr...@googlegroups.com > > > > > For more options, visit this group at > > > > >http://groups.google.com/group/android-developers?hl=en > > > > > > -- > > > > Dianne Hackborn > > > > Android framework engineer > > > > hack...@android.com > > > > > > Note: please don't send private questions to me, as I don't have time > to > > > > provide private support, and so won't reply to such e-mails. All > such > > > > questions should be posted on public forums, where I and others can > see > > > and > > > > answer them. > > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "Android Developers" group. > > > To post to this group, send email to > android-developers@googlegroups.com > > > To unsubscribe from this group, send email to > > > android-developers+unsubscr...@googlegroups.com > > > For more options, visit this group at > > >http://groups.google.com/group/android-developers?hl=en > > > > -- > > ~ Jeremiah:9:23-24 > > Android 2D MMORPG: > http://solrpg.com/,http://www.youtube.com/user/revoltingx > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- ~ Jeremiah:9:23-24 Android 2D MMORPG: http://solrpg.com/, http://www.youtube.com/user/revoltingx -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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